Hypomelanosis of Ito

Incontinentia pigmenti achromians (also known as "hypomelanosis of Ito") is a cutaneous condition characterized by various patterns of bilateral or unilateral hypopigmentation following the lines of Blaschko. Though the consistency of the skin findings have led to the term "hypomelanosis of Ito", it actually refers to a group of disorders with various genetic causes including polyploidies and aneuploidies. [Source: Wikipedia ]